package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.UserLoginVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties properties;

    @Override
    public UserLoginVO wxLogin(UserLoginDTO userLoginDTO) {

        String openid = openid(userLoginDTO.getCode());

        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        User user = userMapper.getByOpenid(openid);

        if (user == null) {
            user = User.builder()
                        .openid(openid)
                        .createTime(LocalDateTime.now())
                        .build();
            userMapper.insert(user);
        }
        UserLoginVO userLoginVO = new UserLoginVO();
        BeanUtils.copyProperties(user, userLoginVO);
        return userLoginVO;
    }

    private String openid(String code){
        Map<String, String> params = new HashMap<String, String>();
        params.put("appid", properties.getAppid());
        params.put("secret", properties.getSecret());
        params.put("js_code", code);
        params.put("grant_type", "authorization_code");
        String s = HttpClientUtil.doGet(WX_LOGIN_URL, params);

        JSONObject jsonObject = JSON.parseObject(s);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
